[JoeC]

The 1969 COPO Chevelle is # 9562 with eight different ECL codes (AA,BA,CD,CE,DD,DE,EA,FA)that specified the combination of the transmission, the seats, the springs, and the tires. In addition to the eight 9562 XX codes Chevy added two more - the 9566 AA and 9566 BA which are the same as the 9562 EA and 9562 FA combinations with the exception of tires. That makes a total of ten COPO numbers for the 1969 Chevelles. Yenko added his COPO 9737 (which included the 15x7 Wheels) to use as a combination with the COPO option 9562. The Yenko Chevelle is a double COPO. This is from the Chevy documentation that is included in Ed's COPO book.